Perhaps you should try some spelling variations:
sloping lands » sloping land, lying lands
boom during » blooms during, books during, boost during
during risk » using risk, during crises, during crisis
wang yang » wang yan, wang liang, wang yanling
how space » how race
how scale » how stable, how small, new scale
how safe » how safety, how state, how some

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang sloping lands boom during risk ((((how safe) OR (how space))) or (how scale)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang sloping lands boom during risk ((((how safe) OR (how space))) OR (how scale)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang sloping lands boom during risk ((((how safe) OR (how space))) or (how scale)) ;*".